/**
 * Copyright 2014-2019 the original author or authors
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

/** 
 * Dice notation grammar.
 * 
 * This is the notation which RPGs and other tabletop games use to represent operations with dice.
 */

// $antlr-format alignTrailingComments true, columnLimit 150, minEmptyLines 1, maxEmptyLinesToKeep 1, reflowComments false, useTab false
// $antlr-format allowShortRulesOnASingleLine false, allowShortBlocksOnASingleLine true, alignSemicolons hanging, alignColons hanging

parser grammar DiceNotationParser;

options {
    tokenVocab = DiceNotationLexer;
}

/**
 * Rules.
 */

file_
    : notation EOF
    ;

notation
    : dice
    | number
    | addOp
    ;

addOp
    : multOp (ADDOPERATOR multOp)*
    ;

multOp
    : operand (MULTOPERATOR operand)*
    ;

operand
    : dice
    | number
    | LPAREN notation RPAREN
    ;

dice
    : ADDOPERATOR? DIGIT? DSEPARATOR DIGIT
    ;

number
    : ADDOPERATOR? DIGIT
    ;